OpenAI API exposes GPT-5 Nano through model ID gpt-5-nano. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.
Last refreshed 2026-05-10. Next refresh: weekly.
Quick Start
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Code Examples
Install
pip install openaiAPI key
OPENAI_API_KEYModel ID
gpt-5-nanoUse the model slug directly, e.g. "gpt-4o" or "gpt-4.1-mini".
import os
from openai import OpenAI
client = OpenAI() # reads OPENAI_API_KEY from env
response = client.chat.completions.create(
model="gpt-5-nano",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Pricing on OpenAI API
| Type | Price (per 1M) |
|---|---|
| Input tokens | $0.05 |
| Output tokens | $0.40 |
Capabilities
VisionMultimodalReasoningJSON / Tool useStructured OutputsCode ExecutionPrompt CachingBatch API
About GPT-5 Nano
Fastest, cheapest GPT-5 variant for summarization and classification tasks. Also available via Realtime API.
Model Specs
Released2025-08-07
Context400k
ArchitectureDecoder Only
Knowledge cutoff2024-05